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5a5bf490 TB |
1 | /* |
2 | * axp288_fuel_gauge.c - Xpower AXP288 PMIC Fuel Gauge Driver | |
3 | * | |
4 | * Copyright (C) 2014 Intel Corporation | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; version 2 of the License. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/device.h> | |
22 | #include <linux/regmap.h> | |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/interrupt.h> | |
5a5bf490 TB |
25 | #include <linux/workqueue.h> |
26 | #include <linux/mfd/axp20x.h> | |
27 | #include <linux/platform_device.h> | |
28 | #include <linux/power_supply.h> | |
29 | #include <linux/iio/consumer.h> | |
30 | #include <linux/debugfs.h> | |
31 | #include <linux/seq_file.h> | |
32 | ||
33 | #define CHRG_STAT_BAT_SAFE_MODE (1 << 3) | |
34 | #define CHRG_STAT_BAT_VALID (1 << 4) | |
35 | #define CHRG_STAT_BAT_PRESENT (1 << 5) | |
36 | #define CHRG_STAT_CHARGING (1 << 6) | |
37 | #define CHRG_STAT_PMIC_OTP (1 << 7) | |
38 | ||
39 | #define CHRG_CCCV_CC_MASK 0xf /* 4 bits */ | |
40 | #define CHRG_CCCV_CC_BIT_POS 0 | |
41 | #define CHRG_CCCV_CC_OFFSET 200 /* 200mA */ | |
42 | #define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */ | |
43 | #define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */ | |
44 | #define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */ | |
45 | #define CHRG_CCCV_CV_BIT_POS 5 | |
46 | #define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */ | |
47 | #define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */ | |
48 | #define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */ | |
49 | #define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */ | |
50 | #define CHRG_CCCV_CHG_EN (1 << 7) | |
51 | ||
52 | #define CV_4100 4100 /* 4100mV */ | |
53 | #define CV_4150 4150 /* 4150mV */ | |
54 | #define CV_4200 4200 /* 4200mV */ | |
55 | #define CV_4350 4350 /* 4350mV */ | |
56 | ||
57 | #define TEMP_IRQ_CFG_QWBTU (1 << 0) | |
58 | #define TEMP_IRQ_CFG_WBTU (1 << 1) | |
59 | #define TEMP_IRQ_CFG_QWBTO (1 << 2) | |
60 | #define TEMP_IRQ_CFG_WBTO (1 << 3) | |
61 | #define TEMP_IRQ_CFG_MASK 0xf | |
62 | ||
63 | #define FG_IRQ_CFG_LOWBATT_WL2 (1 << 0) | |
64 | #define FG_IRQ_CFG_LOWBATT_WL1 (1 << 1) | |
65 | #define FG_IRQ_CFG_LOWBATT_MASK 0x3 | |
66 | #define LOWBAT_IRQ_STAT_LOWBATT_WL2 (1 << 0) | |
67 | #define LOWBAT_IRQ_STAT_LOWBATT_WL1 (1 << 1) | |
68 | ||
69 | #define FG_CNTL_OCV_ADJ_STAT (1 << 2) | |
70 | #define FG_CNTL_OCV_ADJ_EN (1 << 3) | |
71 | #define FG_CNTL_CAP_ADJ_STAT (1 << 4) | |
72 | #define FG_CNTL_CAP_ADJ_EN (1 << 5) | |
73 | #define FG_CNTL_CC_EN (1 << 6) | |
74 | #define FG_CNTL_GAUGE_EN (1 << 7) | |
75 | ||
76 | #define FG_REP_CAP_VALID (1 << 7) | |
77 | #define FG_REP_CAP_VAL_MASK 0x7F | |
78 | ||
79 | #define FG_DES_CAP1_VALID (1 << 7) | |
80 | #define FG_DES_CAP1_VAL_MASK 0x7F | |
81 | #define FG_DES_CAP0_VAL_MASK 0xFF | |
82 | #define FG_DES_CAP_RES_LSB 1456 /* 1.456mAhr */ | |
83 | ||
84 | #define FG_CC_MTR1_VALID (1 << 7) | |
85 | #define FG_CC_MTR1_VAL_MASK 0x7F | |
86 | #define FG_CC_MTR0_VAL_MASK 0xFF | |
87 | #define FG_DES_CC_RES_LSB 1456 /* 1.456mAhr */ | |
88 | ||
89 | #define FG_OCV_CAP_VALID (1 << 7) | |
90 | #define FG_OCV_CAP_VAL_MASK 0x7F | |
91 | #define FG_CC_CAP_VALID (1 << 7) | |
92 | #define FG_CC_CAP_VAL_MASK 0x7F | |
93 | ||
94 | #define FG_LOW_CAP_THR1_MASK 0xf0 /* 5% tp 20% */ | |
95 | #define FG_LOW_CAP_THR1_VAL 0xa0 /* 15 perc */ | |
96 | #define FG_LOW_CAP_THR2_MASK 0x0f /* 0% to 15% */ | |
97 | #define FG_LOW_CAP_WARN_THR 14 /* 14 perc */ | |
98 | #define FG_LOW_CAP_CRIT_THR 4 /* 4 perc */ | |
99 | #define FG_LOW_CAP_SHDN_THR 0 /* 0 perc */ | |
100 | ||
101 | #define STATUS_MON_DELAY_JIFFIES (HZ * 60) /*60 sec */ | |
102 | #define NR_RETRY_CNT 3 | |
103 | #define DEV_NAME "axp288_fuel_gauge" | |
104 | ||
105 | /* 1.1mV per LSB expressed in uV */ | |
106 | #define VOLTAGE_FROM_ADC(a) ((a * 11) / 10) | |
107 | /* properties converted to tenths of degrees, uV, uA, uW */ | |
108 | #define PROP_TEMP(a) ((a) * 10) | |
109 | #define UNPROP_TEMP(a) ((a) / 10) | |
110 | #define PROP_VOLT(a) ((a) * 1000) | |
111 | #define PROP_CURR(a) ((a) * 1000) | |
112 | ||
113 | #define AXP288_FG_INTR_NUM 6 | |
114 | enum { | |
115 | QWBTU_IRQ = 0, | |
116 | WBTU_IRQ, | |
117 | QWBTO_IRQ, | |
118 | WBTO_IRQ, | |
119 | WL2_IRQ, | |
120 | WL1_IRQ, | |
121 | }; | |
122 | ||
123 | struct axp288_fg_info { | |
124 | struct platform_device *pdev; | |
125 | struct axp20x_fg_pdata *pdata; | |
126 | struct regmap *regmap; | |
127 | struct regmap_irq_chip_data *regmap_irqc; | |
128 | int irq[AXP288_FG_INTR_NUM]; | |
297d716f | 129 | struct power_supply *bat; |
5a5bf490 TB |
130 | struct mutex lock; |
131 | int status; | |
132 | struct delayed_work status_monitor; | |
133 | struct dentry *debug_file; | |
134 | }; | |
135 | ||
136 | static enum power_supply_property fuel_gauge_props[] = { | |
137 | POWER_SUPPLY_PROP_STATUS, | |
138 | POWER_SUPPLY_PROP_PRESENT, | |
139 | POWER_SUPPLY_PROP_HEALTH, | |
140 | POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, | |
141 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
142 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
143 | POWER_SUPPLY_PROP_VOLTAGE_OCV, | |
144 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
145 | POWER_SUPPLY_PROP_CAPACITY, | |
146 | POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN, | |
147 | POWER_SUPPLY_PROP_TEMP, | |
148 | POWER_SUPPLY_PROP_TEMP_MAX, | |
149 | POWER_SUPPLY_PROP_TEMP_MIN, | |
150 | POWER_SUPPLY_PROP_TEMP_ALERT_MIN, | |
151 | POWER_SUPPLY_PROP_TEMP_ALERT_MAX, | |
152 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
153 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
154 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
155 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
156 | POWER_SUPPLY_PROP_MODEL_NAME, | |
157 | }; | |
158 | ||
159 | static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg) | |
160 | { | |
161 | int ret, i; | |
162 | unsigned int val; | |
163 | ||
164 | for (i = 0; i < NR_RETRY_CNT; i++) { | |
165 | ret = regmap_read(info->regmap, reg, &val); | |
166 | if (ret == -EBUSY) | |
167 | continue; | |
168 | else | |
169 | break; | |
170 | } | |
171 | ||
172 | if (ret < 0) | |
173 | dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", ret); | |
174 | ||
175 | return val; | |
176 | } | |
177 | ||
178 | static int fuel_gauge_reg_writeb(struct axp288_fg_info *info, int reg, u8 val) | |
179 | { | |
180 | int ret; | |
181 | ||
182 | ret = regmap_write(info->regmap, reg, (unsigned int)val); | |
183 | ||
184 | if (ret < 0) | |
185 | dev_err(&info->pdev->dev, "axp288 reg write err:%d\n", ret); | |
186 | ||
187 | return ret; | |
188 | } | |
189 | ||
190 | static int pmic_read_adc_val(const char *name, int *raw_val, | |
191 | struct axp288_fg_info *info) | |
192 | { | |
193 | int ret, val = 0; | |
194 | struct iio_channel *indio_chan; | |
195 | ||
196 | indio_chan = iio_channel_get(NULL, name); | |
197 | if (IS_ERR_OR_NULL(indio_chan)) { | |
198 | ret = PTR_ERR(indio_chan); | |
199 | goto exit; | |
200 | } | |
201 | ret = iio_read_channel_raw(indio_chan, &val); | |
202 | if (ret < 0) { | |
203 | dev_err(&info->pdev->dev, | |
204 | "IIO channel read error: %x, %x\n", ret, val); | |
205 | goto err_exit; | |
206 | } | |
207 | ||
208 | dev_dbg(&info->pdev->dev, "adc raw val=%x\n", val); | |
209 | *raw_val = val; | |
210 | ||
211 | err_exit: | |
212 | iio_channel_release(indio_chan); | |
213 | exit: | |
214 | return ret; | |
215 | } | |
216 | ||
217 | #ifdef CONFIG_DEBUG_FS | |
218 | static int fuel_gauge_debug_show(struct seq_file *s, void *data) | |
219 | { | |
220 | struct axp288_fg_info *info = s->private; | |
221 | int raw_val, ret; | |
222 | ||
223 | seq_printf(s, " PWR_STATUS[%02x] : %02x\n", | |
224 | AXP20X_PWR_INPUT_STATUS, | |
225 | fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS)); | |
226 | seq_printf(s, "PWR_OP_MODE[%02x] : %02x\n", | |
227 | AXP20X_PWR_OP_MODE, | |
228 | fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE)); | |
229 | seq_printf(s, " CHRG_CTRL1[%02x] : %02x\n", | |
230 | AXP20X_CHRG_CTRL1, | |
231 | fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1)); | |
232 | seq_printf(s, " VLTF[%02x] : %02x\n", | |
233 | AXP20X_V_LTF_DISCHRG, | |
234 | fuel_gauge_reg_readb(info, AXP20X_V_LTF_DISCHRG)); | |
235 | seq_printf(s, " VHTF[%02x] : %02x\n", | |
236 | AXP20X_V_HTF_DISCHRG, | |
237 | fuel_gauge_reg_readb(info, AXP20X_V_HTF_DISCHRG)); | |
238 | seq_printf(s, " CC_CTRL[%02x] : %02x\n", | |
239 | AXP20X_CC_CTRL, | |
240 | fuel_gauge_reg_readb(info, AXP20X_CC_CTRL)); | |
241 | seq_printf(s, "BATTERY CAP[%02x] : %02x\n", | |
242 | AXP20X_FG_RES, | |
243 | fuel_gauge_reg_readb(info, AXP20X_FG_RES)); | |
244 | seq_printf(s, " FG_RDC1[%02x] : %02x\n", | |
245 | AXP288_FG_RDC1_REG, | |
246 | fuel_gauge_reg_readb(info, AXP288_FG_RDC1_REG)); | |
247 | seq_printf(s, " FG_RDC0[%02x] : %02x\n", | |
248 | AXP288_FG_RDC0_REG, | |
249 | fuel_gauge_reg_readb(info, AXP288_FG_RDC0_REG)); | |
250 | seq_printf(s, " FG_OCVH[%02x] : %02x\n", | |
251 | AXP288_FG_OCVH_REG, | |
252 | fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG)); | |
253 | seq_printf(s, " FG_OCVL[%02x] : %02x\n", | |
254 | AXP288_FG_OCVL_REG, | |
255 | fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG)); | |
256 | seq_printf(s, "FG_DES_CAP1[%02x] : %02x\n", | |
257 | AXP288_FG_DES_CAP1_REG, | |
258 | fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG)); | |
259 | seq_printf(s, "FG_DES_CAP0[%02x] : %02x\n", | |
260 | AXP288_FG_DES_CAP0_REG, | |
261 | fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP0_REG)); | |
262 | seq_printf(s, " FG_CC_MTR1[%02x] : %02x\n", | |
263 | AXP288_FG_CC_MTR1_REG, | |
264 | fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR1_REG)); | |
265 | seq_printf(s, " FG_CC_MTR0[%02x] : %02x\n", | |
266 | AXP288_FG_CC_MTR0_REG, | |
267 | fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR0_REG)); | |
268 | seq_printf(s, " FG_OCV_CAP[%02x] : %02x\n", | |
269 | AXP288_FG_OCV_CAP_REG, | |
270 | fuel_gauge_reg_readb(info, AXP288_FG_OCV_CAP_REG)); | |
271 | seq_printf(s, " FG_CC_CAP[%02x] : %02x\n", | |
272 | AXP288_FG_CC_CAP_REG, | |
273 | fuel_gauge_reg_readb(info, AXP288_FG_CC_CAP_REG)); | |
274 | seq_printf(s, " FG_LOW_CAP[%02x] : %02x\n", | |
275 | AXP288_FG_LOW_CAP_REG, | |
276 | fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG)); | |
277 | seq_printf(s, "TUNING_CTL0[%02x] : %02x\n", | |
278 | AXP288_FG_TUNE0, | |
279 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE0)); | |
280 | seq_printf(s, "TUNING_CTL1[%02x] : %02x\n", | |
281 | AXP288_FG_TUNE1, | |
282 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE1)); | |
283 | seq_printf(s, "TUNING_CTL2[%02x] : %02x\n", | |
284 | AXP288_FG_TUNE2, | |
285 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE2)); | |
286 | seq_printf(s, "TUNING_CTL3[%02x] : %02x\n", | |
287 | AXP288_FG_TUNE3, | |
288 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE3)); | |
289 | seq_printf(s, "TUNING_CTL4[%02x] : %02x\n", | |
290 | AXP288_FG_TUNE4, | |
291 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE4)); | |
292 | seq_printf(s, "TUNING_CTL5[%02x] : %02x\n", | |
293 | AXP288_FG_TUNE5, | |
294 | fuel_gauge_reg_readb(info, AXP288_FG_TUNE5)); | |
295 | ||
296 | ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info); | |
297 | if (ret >= 0) | |
298 | seq_printf(s, "axp288-batttemp : %d\n", raw_val); | |
299 | ret = pmic_read_adc_val("axp288-pmic-temp", &raw_val, info); | |
300 | if (ret >= 0) | |
301 | seq_printf(s, "axp288-pmictemp : %d\n", raw_val); | |
302 | ret = pmic_read_adc_val("axp288-system-temp", &raw_val, info); | |
303 | if (ret >= 0) | |
304 | seq_printf(s, "axp288-systtemp : %d\n", raw_val); | |
305 | ret = pmic_read_adc_val("axp288-chrg-curr", &raw_val, info); | |
306 | if (ret >= 0) | |
307 | seq_printf(s, "axp288-chrgcurr : %d\n", raw_val); | |
308 | ret = pmic_read_adc_val("axp288-chrg-d-curr", &raw_val, info); | |
309 | if (ret >= 0) | |
310 | seq_printf(s, "axp288-dchrgcur : %d\n", raw_val); | |
311 | ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info); | |
312 | if (ret >= 0) | |
313 | seq_printf(s, "axp288-battvolt : %d\n", raw_val); | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | static int debug_open(struct inode *inode, struct file *file) | |
319 | { | |
320 | return single_open(file, fuel_gauge_debug_show, inode->i_private); | |
321 | } | |
322 | ||
323 | static const struct file_operations fg_debug_fops = { | |
324 | .open = debug_open, | |
325 | .read = seq_read, | |
326 | .llseek = seq_lseek, | |
327 | .release = single_release, | |
328 | }; | |
329 | ||
330 | static void fuel_gauge_create_debugfs(struct axp288_fg_info *info) | |
331 | { | |
332 | info->debug_file = debugfs_create_file("fuelgauge", 0666, NULL, | |
333 | info, &fg_debug_fops); | |
334 | } | |
335 | ||
336 | static void fuel_gauge_remove_debugfs(struct axp288_fg_info *info) | |
337 | { | |
338 | debugfs_remove(info->debug_file); | |
339 | } | |
340 | #else | |
341 | static inline void fuel_gauge_create_debugfs(struct axp288_fg_info *info) | |
342 | { | |
343 | } | |
344 | static inline void fuel_gauge_remove_debugfs(struct axp288_fg_info *info) | |
345 | { | |
346 | } | |
347 | #endif | |
348 | ||
349 | static void fuel_gauge_get_status(struct axp288_fg_info *info) | |
350 | { | |
351 | int pwr_stat, ret; | |
352 | int charge, discharge; | |
353 | ||
354 | pwr_stat = fuel_gauge_reg_readb(info, AXP20X_PWR_INPUT_STATUS); | |
355 | if (pwr_stat < 0) { | |
356 | dev_err(&info->pdev->dev, | |
357 | "PWR STAT read failed:%d\n", pwr_stat); | |
358 | return; | |
359 | } | |
360 | ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info); | |
361 | if (ret < 0) { | |
362 | dev_err(&info->pdev->dev, | |
363 | "ADC charge current read failed:%d\n", ret); | |
364 | return; | |
365 | } | |
366 | ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info); | |
367 | if (ret < 0) { | |
368 | dev_err(&info->pdev->dev, | |
369 | "ADC discharge current read failed:%d\n", ret); | |
370 | return; | |
371 | } | |
372 | ||
373 | if (charge > 0) | |
374 | info->status = POWER_SUPPLY_STATUS_CHARGING; | |
375 | else if (discharge > 0) | |
376 | info->status = POWER_SUPPLY_STATUS_DISCHARGING; | |
377 | else { | |
378 | if (pwr_stat & CHRG_STAT_BAT_PRESENT) | |
379 | info->status = POWER_SUPPLY_STATUS_FULL; | |
380 | else | |
381 | info->status = POWER_SUPPLY_STATUS_NOT_CHARGING; | |
382 | } | |
383 | } | |
384 | ||
385 | static int fuel_gauge_get_vbatt(struct axp288_fg_info *info, int *vbatt) | |
386 | { | |
387 | int ret = 0, raw_val; | |
388 | ||
389 | ret = pmic_read_adc_val("axp288-batt-volt", &raw_val, info); | |
390 | if (ret < 0) | |
391 | goto vbatt_read_fail; | |
392 | ||
393 | *vbatt = VOLTAGE_FROM_ADC(raw_val); | |
394 | vbatt_read_fail: | |
395 | return ret; | |
396 | } | |
397 | ||
398 | static int fuel_gauge_get_current(struct axp288_fg_info *info, int *cur) | |
399 | { | |
400 | int ret, value = 0; | |
401 | int charge, discharge; | |
402 | ||
403 | ret = pmic_read_adc_val("axp288-chrg-curr", &charge, info); | |
404 | if (ret < 0) | |
405 | goto current_read_fail; | |
406 | ret = pmic_read_adc_val("axp288-chrg-d-curr", &discharge, info); | |
407 | if (ret < 0) | |
408 | goto current_read_fail; | |
409 | ||
410 | if (charge > 0) | |
411 | value = charge; | |
412 | else if (discharge > 0) | |
413 | value = -1 * discharge; | |
414 | ||
415 | *cur = value; | |
416 | current_read_fail: | |
417 | return ret; | |
418 | } | |
419 | ||
420 | static int temp_to_adc(struct axp288_fg_info *info, int tval) | |
421 | { | |
422 | int rntc = 0, i, ret, adc_val; | |
423 | int rmin, rmax, tmin, tmax; | |
424 | int tcsz = info->pdata->tcsz; | |
425 | ||
426 | /* get the Rntc resitance value for this temp */ | |
427 | if (tval > info->pdata->thermistor_curve[0][1]) { | |
428 | rntc = info->pdata->thermistor_curve[0][0]; | |
429 | } else if (tval <= info->pdata->thermistor_curve[tcsz-1][1]) { | |
430 | rntc = info->pdata->thermistor_curve[tcsz-1][0]; | |
431 | } else { | |
432 | for (i = 1; i < tcsz; i++) { | |
433 | if (tval > info->pdata->thermistor_curve[i][1]) { | |
434 | rmin = info->pdata->thermistor_curve[i-1][0]; | |
435 | rmax = info->pdata->thermistor_curve[i][0]; | |
436 | tmin = info->pdata->thermistor_curve[i-1][1]; | |
437 | tmax = info->pdata->thermistor_curve[i][1]; | |
438 | rntc = rmin + ((rmax - rmin) * | |
439 | (tval - tmin) / (tmax - tmin)); | |
440 | break; | |
441 | } | |
442 | } | |
443 | } | |
444 | ||
445 | /* we need the current to calculate the proper adc voltage */ | |
446 | ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE); | |
447 | if (ret < 0) { | |
448 | dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); | |
449 | ret = 0x30; | |
450 | } | |
451 | ||
452 | /* | |
453 | * temperature is proportional to NTS thermistor resistance | |
454 | * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA | |
455 | * [12-bit ADC VAL] = R_NTC(Ω) * current / 800 | |
456 | */ | |
457 | adc_val = rntc * (20 + (20 * ((ret >> 4) & 0x3))) / 800; | |
458 | ||
459 | return adc_val; | |
460 | } | |
461 | ||
462 | static int adc_to_temp(struct axp288_fg_info *info, int adc_val) | |
463 | { | |
464 | int ret, r, i, tval = 0; | |
465 | int rmin, rmax, tmin, tmax; | |
466 | int tcsz = info->pdata->tcsz; | |
467 | ||
468 | ret = fuel_gauge_reg_readb(info, AXP20X_ADC_RATE); | |
469 | if (ret < 0) { | |
470 | dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); | |
471 | ret = 0x30; | |
472 | } | |
473 | ||
474 | /* | |
475 | * temperature is proportional to NTS thermistor resistance | |
476 | * ADC_RATE[5-4] determines current, 00=20uA,01=40uA,10=60uA,11=80uA | |
477 | * R_NTC(Ω) = [12-bit ADC VAL] * 800 / current | |
478 | */ | |
479 | r = adc_val * 800 / (20 + (20 * ((ret >> 4) & 0x3))); | |
480 | ||
481 | if (r < info->pdata->thermistor_curve[0][0]) { | |
482 | tval = info->pdata->thermistor_curve[0][1]; | |
483 | } else if (r >= info->pdata->thermistor_curve[tcsz-1][0]) { | |
484 | tval = info->pdata->thermistor_curve[tcsz-1][1]; | |
485 | } else { | |
486 | for (i = 1; i < tcsz; i++) { | |
487 | if (r < info->pdata->thermistor_curve[i][0]) { | |
488 | rmin = info->pdata->thermistor_curve[i-1][0]; | |
489 | rmax = info->pdata->thermistor_curve[i][0]; | |
490 | tmin = info->pdata->thermistor_curve[i-1][1]; | |
491 | tmax = info->pdata->thermistor_curve[i][1]; | |
492 | tval = tmin + ((tmax - tmin) * | |
493 | (r - rmin) / (rmax - rmin)); | |
494 | break; | |
495 | } | |
496 | } | |
497 | } | |
498 | ||
499 | return tval; | |
500 | } | |
501 | ||
502 | static int fuel_gauge_get_btemp(struct axp288_fg_info *info, int *btemp) | |
503 | { | |
504 | int ret, raw_val = 0; | |
505 | ||
506 | ret = pmic_read_adc_val("axp288-batt-temp", &raw_val, info); | |
507 | if (ret < 0) | |
508 | goto temp_read_fail; | |
509 | ||
510 | *btemp = adc_to_temp(info, raw_val); | |
511 | ||
512 | temp_read_fail: | |
513 | return ret; | |
514 | } | |
515 | ||
516 | static int fuel_gauge_get_vocv(struct axp288_fg_info *info, int *vocv) | |
517 | { | |
518 | int ret, value; | |
519 | ||
520 | /* 12-bit data value, upper 8 in OCVH, lower 4 in OCVL */ | |
521 | ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVH_REG); | |
522 | if (ret < 0) | |
523 | goto vocv_read_fail; | |
524 | value = ret << 4; | |
525 | ||
526 | ret = fuel_gauge_reg_readb(info, AXP288_FG_OCVL_REG); | |
527 | if (ret < 0) | |
528 | goto vocv_read_fail; | |
529 | value |= (ret & 0xf); | |
530 | ||
531 | *vocv = VOLTAGE_FROM_ADC(value); | |
532 | vocv_read_fail: | |
533 | return ret; | |
534 | } | |
535 | ||
536 | static int fuel_gauge_battery_health(struct axp288_fg_info *info) | |
537 | { | |
538 | int temp, vocv; | |
539 | int ret, health = POWER_SUPPLY_HEALTH_UNKNOWN; | |
540 | ||
541 | ret = fuel_gauge_get_btemp(info, &temp); | |
542 | if (ret < 0) | |
543 | goto health_read_fail; | |
544 | ||
545 | ret = fuel_gauge_get_vocv(info, &vocv); | |
546 | if (ret < 0) | |
547 | goto health_read_fail; | |
548 | ||
549 | if (vocv > info->pdata->max_volt) | |
550 | health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; | |
551 | else if (temp > info->pdata->max_temp) | |
552 | health = POWER_SUPPLY_HEALTH_OVERHEAT; | |
553 | else if (temp < info->pdata->min_temp) | |
554 | health = POWER_SUPPLY_HEALTH_COLD; | |
555 | else if (vocv < info->pdata->min_volt) | |
556 | health = POWER_SUPPLY_HEALTH_DEAD; | |
557 | else | |
558 | health = POWER_SUPPLY_HEALTH_GOOD; | |
559 | ||
560 | health_read_fail: | |
561 | return health; | |
562 | } | |
563 | ||
564 | static int fuel_gauge_set_high_btemp_alert(struct axp288_fg_info *info) | |
565 | { | |
566 | int ret, adc_val; | |
567 | ||
568 | /* program temperature threshold as 1/16 ADC value */ | |
569 | adc_val = temp_to_adc(info, info->pdata->max_temp); | |
570 | ret = fuel_gauge_reg_writeb(info, AXP20X_V_HTF_DISCHRG, adc_val >> 4); | |
571 | ||
572 | return ret; | |
573 | } | |
574 | ||
575 | static int fuel_gauge_set_low_btemp_alert(struct axp288_fg_info *info) | |
576 | { | |
577 | int ret, adc_val; | |
578 | ||
579 | /* program temperature threshold as 1/16 ADC value */ | |
580 | adc_val = temp_to_adc(info, info->pdata->min_temp); | |
581 | ret = fuel_gauge_reg_writeb(info, AXP20X_V_LTF_DISCHRG, adc_val >> 4); | |
582 | ||
583 | return ret; | |
584 | } | |
585 | ||
586 | static int fuel_gauge_get_property(struct power_supply *ps, | |
587 | enum power_supply_property prop, | |
588 | union power_supply_propval *val) | |
589 | { | |
297d716f | 590 | struct axp288_fg_info *info = power_supply_get_drvdata(ps); |
5a5bf490 TB |
591 | int ret = 0, value; |
592 | ||
593 | mutex_lock(&info->lock); | |
594 | switch (prop) { | |
595 | case POWER_SUPPLY_PROP_STATUS: | |
596 | fuel_gauge_get_status(info); | |
597 | val->intval = info->status; | |
598 | break; | |
599 | case POWER_SUPPLY_PROP_HEALTH: | |
600 | val->intval = fuel_gauge_battery_health(info); | |
601 | break; | |
602 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
603 | ret = fuel_gauge_get_vbatt(info, &value); | |
604 | if (ret < 0) | |
605 | goto fuel_gauge_read_err; | |
606 | val->intval = PROP_VOLT(value); | |
607 | break; | |
608 | case POWER_SUPPLY_PROP_VOLTAGE_OCV: | |
609 | ret = fuel_gauge_get_vocv(info, &value); | |
610 | if (ret < 0) | |
611 | goto fuel_gauge_read_err; | |
612 | val->intval = PROP_VOLT(value); | |
613 | break; | |
614 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
615 | ret = fuel_gauge_get_current(info, &value); | |
616 | if (ret < 0) | |
617 | goto fuel_gauge_read_err; | |
618 | val->intval = PROP_CURR(value); | |
619 | break; | |
620 | case POWER_SUPPLY_PROP_PRESENT: | |
621 | ret = fuel_gauge_reg_readb(info, AXP20X_PWR_OP_MODE); | |
622 | if (ret < 0) | |
623 | goto fuel_gauge_read_err; | |
624 | ||
625 | if (ret & CHRG_STAT_BAT_PRESENT) | |
626 | val->intval = 1; | |
627 | else | |
628 | val->intval = 0; | |
629 | break; | |
630 | case POWER_SUPPLY_PROP_CAPACITY: | |
631 | ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES); | |
632 | if (ret < 0) | |
633 | goto fuel_gauge_read_err; | |
634 | ||
635 | if (!(ret & FG_REP_CAP_VALID)) | |
636 | dev_err(&info->pdev->dev, | |
637 | "capacity measurement not valid\n"); | |
638 | val->intval = (ret & FG_REP_CAP_VAL_MASK); | |
639 | break; | |
640 | case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: | |
641 | ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG); | |
642 | if (ret < 0) | |
643 | goto fuel_gauge_read_err; | |
644 | val->intval = (ret & 0x0f); | |
645 | break; | |
646 | case POWER_SUPPLY_PROP_TEMP: | |
647 | ret = fuel_gauge_get_btemp(info, &value); | |
648 | if (ret < 0) | |
649 | goto fuel_gauge_read_err; | |
650 | val->intval = PROP_TEMP(value); | |
651 | break; | |
652 | case POWER_SUPPLY_PROP_TEMP_MAX: | |
653 | case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: | |
654 | val->intval = PROP_TEMP(info->pdata->max_temp); | |
655 | break; | |
656 | case POWER_SUPPLY_PROP_TEMP_MIN: | |
657 | case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: | |
658 | val->intval = PROP_TEMP(info->pdata->min_temp); | |
659 | break; | |
660 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
661 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
662 | break; | |
663 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
664 | ret = fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR1_REG); | |
665 | if (ret < 0) | |
666 | goto fuel_gauge_read_err; | |
667 | ||
668 | value = (ret & FG_CC_MTR1_VAL_MASK) << 8; | |
669 | ret = fuel_gauge_reg_readb(info, AXP288_FG_CC_MTR0_REG); | |
670 | if (ret < 0) | |
671 | goto fuel_gauge_read_err; | |
672 | value |= (ret & FG_CC_MTR0_VAL_MASK); | |
673 | val->intval = value * FG_DES_CAP_RES_LSB; | |
674 | break; | |
675 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
676 | ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); | |
677 | if (ret < 0) | |
678 | goto fuel_gauge_read_err; | |
679 | ||
680 | value = (ret & FG_DES_CAP1_VAL_MASK) << 8; | |
681 | ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP0_REG); | |
682 | if (ret < 0) | |
683 | goto fuel_gauge_read_err; | |
684 | value |= (ret & FG_DES_CAP0_VAL_MASK); | |
685 | val->intval = value * FG_DES_CAP_RES_LSB; | |
686 | break; | |
687 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
688 | val->intval = PROP_CURR(info->pdata->design_cap); | |
689 | break; | |
690 | case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: | |
691 | val->intval = PROP_VOLT(info->pdata->max_volt); | |
692 | break; | |
693 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
694 | val->intval = PROP_VOLT(info->pdata->min_volt); | |
695 | break; | |
696 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
697 | val->strval = info->pdata->battid; | |
698 | break; | |
699 | default: | |
700 | mutex_unlock(&info->lock); | |
701 | return -EINVAL; | |
702 | } | |
703 | ||
704 | mutex_unlock(&info->lock); | |
705 | return 0; | |
706 | ||
707 | fuel_gauge_read_err: | |
708 | mutex_unlock(&info->lock); | |
709 | return ret; | |
710 | } | |
711 | ||
712 | static int fuel_gauge_set_property(struct power_supply *ps, | |
713 | enum power_supply_property prop, | |
714 | const union power_supply_propval *val) | |
715 | { | |
297d716f | 716 | struct axp288_fg_info *info = power_supply_get_drvdata(ps); |
5a5bf490 TB |
717 | int ret = 0; |
718 | ||
719 | mutex_lock(&info->lock); | |
720 | switch (prop) { | |
721 | case POWER_SUPPLY_PROP_STATUS: | |
722 | info->status = val->intval; | |
723 | break; | |
724 | case POWER_SUPPLY_PROP_TEMP_MIN: | |
725 | case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: | |
726 | if ((val->intval < PD_DEF_MIN_TEMP) || | |
727 | (val->intval > PD_DEF_MAX_TEMP)) { | |
728 | ret = -EINVAL; | |
729 | break; | |
730 | } | |
731 | info->pdata->min_temp = UNPROP_TEMP(val->intval); | |
732 | ret = fuel_gauge_set_low_btemp_alert(info); | |
733 | if (ret < 0) | |
734 | dev_err(&info->pdev->dev, | |
735 | "temp alert min set fail:%d\n", ret); | |
736 | break; | |
737 | case POWER_SUPPLY_PROP_TEMP_MAX: | |
738 | case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: | |
739 | if ((val->intval < PD_DEF_MIN_TEMP) || | |
740 | (val->intval > PD_DEF_MAX_TEMP)) { | |
741 | ret = -EINVAL; | |
742 | break; | |
743 | } | |
744 | info->pdata->max_temp = UNPROP_TEMP(val->intval); | |
745 | ret = fuel_gauge_set_high_btemp_alert(info); | |
746 | if (ret < 0) | |
747 | dev_err(&info->pdev->dev, | |
748 | "temp alert max set fail:%d\n", ret); | |
749 | break; | |
750 | case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: | |
751 | if ((val->intval < 0) || (val->intval > 15)) { | |
752 | ret = -EINVAL; | |
753 | break; | |
754 | } | |
755 | ret = fuel_gauge_reg_readb(info, AXP288_FG_LOW_CAP_REG); | |
756 | if (ret < 0) | |
757 | break; | |
758 | ret &= 0xf0; | |
759 | ret |= (val->intval & 0xf); | |
760 | ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, ret); | |
761 | break; | |
762 | default: | |
763 | ret = -EINVAL; | |
764 | break; | |
765 | } | |
766 | ||
767 | mutex_unlock(&info->lock); | |
768 | return ret; | |
769 | } | |
770 | ||
771 | static int fuel_gauge_property_is_writeable(struct power_supply *psy, | |
772 | enum power_supply_property psp) | |
773 | { | |
774 | int ret; | |
775 | ||
776 | switch (psp) { | |
777 | case POWER_SUPPLY_PROP_STATUS: | |
778 | case POWER_SUPPLY_PROP_TEMP_MIN: | |
779 | case POWER_SUPPLY_PROP_TEMP_ALERT_MIN: | |
780 | case POWER_SUPPLY_PROP_TEMP_MAX: | |
781 | case POWER_SUPPLY_PROP_TEMP_ALERT_MAX: | |
782 | case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN: | |
783 | ret = 1; | |
784 | break; | |
785 | default: | |
786 | ret = 0; | |
787 | } | |
788 | ||
789 | return ret; | |
790 | } | |
791 | ||
792 | static void fuel_gauge_status_monitor(struct work_struct *work) | |
793 | { | |
794 | struct axp288_fg_info *info = container_of(work, | |
795 | struct axp288_fg_info, status_monitor.work); | |
796 | ||
797 | fuel_gauge_get_status(info); | |
297d716f | 798 | power_supply_changed(info->bat); |
5a5bf490 TB |
799 | schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES); |
800 | } | |
801 | ||
802 | static irqreturn_t fuel_gauge_thread_handler(int irq, void *dev) | |
803 | { | |
804 | struct axp288_fg_info *info = dev; | |
805 | int i; | |
806 | ||
807 | for (i = 0; i < AXP288_FG_INTR_NUM; i++) { | |
808 | if (info->irq[i] == irq) | |
809 | break; | |
810 | } | |
811 | ||
812 | if (i >= AXP288_FG_INTR_NUM) { | |
813 | dev_warn(&info->pdev->dev, "spurious interrupt!!\n"); | |
814 | return IRQ_NONE; | |
815 | } | |
816 | ||
817 | switch (i) { | |
818 | case QWBTU_IRQ: | |
819 | dev_info(&info->pdev->dev, | |
820 | "Quit Battery under temperature in work mode IRQ (QWBTU)\n"); | |
821 | break; | |
822 | case WBTU_IRQ: | |
823 | dev_info(&info->pdev->dev, | |
824 | "Battery under temperature in work mode IRQ (WBTU)\n"); | |
825 | break; | |
826 | case QWBTO_IRQ: | |
827 | dev_info(&info->pdev->dev, | |
828 | "Quit Battery over temperature in work mode IRQ (QWBTO)\n"); | |
829 | break; | |
830 | case WBTO_IRQ: | |
831 | dev_info(&info->pdev->dev, | |
832 | "Battery over temperature in work mode IRQ (WBTO)\n"); | |
833 | break; | |
834 | case WL2_IRQ: | |
835 | dev_info(&info->pdev->dev, "Low Batt Warning(2) INTR\n"); | |
836 | break; | |
837 | case WL1_IRQ: | |
838 | dev_info(&info->pdev->dev, "Low Batt Warning(1) INTR\n"); | |
839 | break; | |
840 | default: | |
841 | dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n"); | |
842 | } | |
843 | ||
297d716f | 844 | power_supply_changed(info->bat); |
5a5bf490 TB |
845 | return IRQ_HANDLED; |
846 | } | |
847 | ||
848 | static void fuel_gauge_external_power_changed(struct power_supply *psy) | |
849 | { | |
297d716f | 850 | struct axp288_fg_info *info = power_supply_get_drvdata(psy); |
5a5bf490 | 851 | |
297d716f | 852 | power_supply_changed(info->bat); |
5a5bf490 TB |
853 | } |
854 | ||
297d716f KK |
855 | static const struct power_supply_desc fuel_gauge_desc = { |
856 | .name = DEV_NAME, | |
857 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
858 | .properties = fuel_gauge_props, | |
859 | .num_properties = ARRAY_SIZE(fuel_gauge_props), | |
860 | .get_property = fuel_gauge_get_property, | |
861 | .set_property = fuel_gauge_set_property, | |
862 | .property_is_writeable = fuel_gauge_property_is_writeable, | |
863 | .external_power_changed = fuel_gauge_external_power_changed, | |
864 | }; | |
865 | ||
5a5bf490 TB |
866 | static int fuel_gauge_set_lowbatt_thresholds(struct axp288_fg_info *info) |
867 | { | |
868 | int ret; | |
869 | u8 reg_val; | |
870 | ||
871 | ret = fuel_gauge_reg_readb(info, AXP20X_FG_RES); | |
872 | if (ret < 0) { | |
873 | dev_err(&info->pdev->dev, "%s:read err:%d\n", __func__, ret); | |
874 | return ret; | |
875 | } | |
876 | ret = (ret & FG_REP_CAP_VAL_MASK); | |
877 | ||
878 | if (ret > FG_LOW_CAP_WARN_THR) | |
879 | reg_val = FG_LOW_CAP_WARN_THR; | |
880 | else if (ret > FG_LOW_CAP_CRIT_THR) | |
881 | reg_val = FG_LOW_CAP_CRIT_THR; | |
882 | else | |
883 | reg_val = FG_LOW_CAP_SHDN_THR; | |
884 | ||
885 | reg_val |= FG_LOW_CAP_THR1_VAL; | |
886 | ret = fuel_gauge_reg_writeb(info, AXP288_FG_LOW_CAP_REG, reg_val); | |
887 | if (ret < 0) | |
888 | dev_err(&info->pdev->dev, "%s:write err:%d\n", __func__, ret); | |
889 | ||
890 | return ret; | |
891 | } | |
892 | ||
893 | static int fuel_gauge_program_vbatt_full(struct axp288_fg_info *info) | |
894 | { | |
895 | int ret; | |
896 | u8 val; | |
897 | ||
898 | ret = fuel_gauge_reg_readb(info, AXP20X_CHRG_CTRL1); | |
899 | if (ret < 0) | |
900 | goto fg_prog_ocv_fail; | |
901 | else | |
902 | val = (ret & ~CHRG_CCCV_CV_MASK); | |
903 | ||
904 | switch (info->pdata->max_volt) { | |
905 | case CV_4100: | |
906 | val |= (CHRG_CCCV_CV_4100MV << CHRG_CCCV_CV_BIT_POS); | |
907 | break; | |
908 | case CV_4150: | |
909 | val |= (CHRG_CCCV_CV_4150MV << CHRG_CCCV_CV_BIT_POS); | |
910 | break; | |
911 | case CV_4200: | |
912 | val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS); | |
913 | break; | |
914 | case CV_4350: | |
915 | val |= (CHRG_CCCV_CV_4350MV << CHRG_CCCV_CV_BIT_POS); | |
916 | break; | |
917 | default: | |
918 | val |= (CHRG_CCCV_CV_4200MV << CHRG_CCCV_CV_BIT_POS); | |
919 | break; | |
920 | } | |
921 | ||
922 | ret = fuel_gauge_reg_writeb(info, AXP20X_CHRG_CTRL1, val); | |
923 | fg_prog_ocv_fail: | |
924 | return ret; | |
925 | } | |
926 | ||
927 | static int fuel_gauge_program_design_cap(struct axp288_fg_info *info) | |
928 | { | |
929 | int ret; | |
930 | ||
931 | ret = fuel_gauge_reg_writeb(info, | |
932 | AXP288_FG_DES_CAP1_REG, info->pdata->cap1); | |
933 | if (ret < 0) | |
934 | goto fg_prog_descap_fail; | |
935 | ||
936 | ret = fuel_gauge_reg_writeb(info, | |
937 | AXP288_FG_DES_CAP0_REG, info->pdata->cap0); | |
938 | ||
939 | fg_prog_descap_fail: | |
940 | return ret; | |
941 | } | |
942 | ||
943 | static int fuel_gauge_program_ocv_curve(struct axp288_fg_info *info) | |
944 | { | |
945 | int ret = 0, i; | |
946 | ||
947 | for (i = 0; i < OCV_CURVE_SIZE; i++) { | |
948 | ret = fuel_gauge_reg_writeb(info, | |
949 | AXP288_FG_OCV_CURVE_REG + i, info->pdata->ocv_curve[i]); | |
950 | if (ret < 0) | |
951 | goto fg_prog_ocv_fail; | |
952 | } | |
953 | ||
954 | fg_prog_ocv_fail: | |
955 | return ret; | |
956 | } | |
957 | ||
958 | static int fuel_gauge_program_rdc_vals(struct axp288_fg_info *info) | |
959 | { | |
960 | int ret; | |
961 | ||
962 | ret = fuel_gauge_reg_writeb(info, | |
963 | AXP288_FG_RDC1_REG, info->pdata->rdc1); | |
964 | if (ret < 0) | |
965 | goto fg_prog_ocv_fail; | |
966 | ||
967 | ret = fuel_gauge_reg_writeb(info, | |
968 | AXP288_FG_RDC0_REG, info->pdata->rdc0); | |
969 | ||
970 | fg_prog_ocv_fail: | |
971 | return ret; | |
972 | } | |
973 | ||
974 | static void fuel_gauge_init_config_regs(struct axp288_fg_info *info) | |
975 | { | |
976 | int ret; | |
977 | ||
978 | /* | |
979 | * check if the config data is already | |
980 | * programmed and if so just return. | |
981 | */ | |
982 | ||
983 | ret = fuel_gauge_reg_readb(info, AXP288_FG_DES_CAP1_REG); | |
984 | if (ret < 0) { | |
985 | dev_warn(&info->pdev->dev, "CAP1 reg read err!!\n"); | |
986 | } else if (!(ret & FG_DES_CAP1_VALID)) { | |
987 | dev_info(&info->pdev->dev, "FG data needs to be initialized\n"); | |
988 | } else { | |
989 | dev_info(&info->pdev->dev, "FG data is already initialized\n"); | |
990 | return; | |
991 | } | |
992 | ||
993 | ret = fuel_gauge_program_vbatt_full(info); | |
994 | if (ret < 0) | |
995 | dev_err(&info->pdev->dev, "set vbatt full fail:%d\n", ret); | |
996 | ||
997 | ret = fuel_gauge_program_design_cap(info); | |
998 | if (ret < 0) | |
999 | dev_err(&info->pdev->dev, "set design cap fail:%d\n", ret); | |
1000 | ||
1001 | ret = fuel_gauge_program_rdc_vals(info); | |
1002 | if (ret < 0) | |
1003 | dev_err(&info->pdev->dev, "set rdc fail:%d\n", ret); | |
1004 | ||
1005 | ret = fuel_gauge_program_ocv_curve(info); | |
1006 | if (ret < 0) | |
1007 | dev_err(&info->pdev->dev, "set ocv curve fail:%d\n", ret); | |
1008 | ||
1009 | ret = fuel_gauge_set_lowbatt_thresholds(info); | |
1010 | if (ret < 0) | |
1011 | dev_err(&info->pdev->dev, "lowbatt thr set fail:%d\n", ret); | |
1012 | ||
1013 | ret = fuel_gauge_reg_writeb(info, AXP20X_CC_CTRL, 0xef); | |
1014 | if (ret < 0) | |
1015 | dev_err(&info->pdev->dev, "gauge cntl set fail:%d\n", ret); | |
1016 | } | |
1017 | ||
1018 | static void fuel_gauge_init_irq(struct axp288_fg_info *info) | |
1019 | { | |
1020 | int ret, i, pirq; | |
1021 | ||
1022 | for (i = 0; i < AXP288_FG_INTR_NUM; i++) { | |
1023 | pirq = platform_get_irq(info->pdev, i); | |
1024 | info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq); | |
1025 | if (info->irq[i] < 0) { | |
1026 | dev_warn(&info->pdev->dev, | |
1027 | "regmap_irq get virq failed for IRQ %d: %d\n", | |
1028 | pirq, info->irq[i]); | |
1029 | info->irq[i] = -1; | |
1030 | goto intr_failed; | |
1031 | } | |
1032 | ret = request_threaded_irq(info->irq[i], | |
1033 | NULL, fuel_gauge_thread_handler, | |
1034 | IRQF_ONESHOT, DEV_NAME, info); | |
1035 | if (ret) { | |
1036 | dev_warn(&info->pdev->dev, | |
1037 | "request irq failed for IRQ %d: %d\n", | |
1038 | pirq, info->irq[i]); | |
1039 | info->irq[i] = -1; | |
1040 | goto intr_failed; | |
1041 | } else { | |
1042 | dev_info(&info->pdev->dev, "HW IRQ %d -> VIRQ %d\n", | |
1043 | pirq, info->irq[i]); | |
1044 | } | |
1045 | } | |
1046 | return; | |
1047 | ||
1048 | intr_failed: | |
1049 | for (; i > 0; i--) { | |
1050 | free_irq(info->irq[i - 1], info); | |
1051 | info->irq[i - 1] = -1; | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | static void fuel_gauge_init_hw_regs(struct axp288_fg_info *info) | |
1056 | { | |
1057 | int ret; | |
1058 | unsigned int val; | |
1059 | ||
1060 | ret = fuel_gauge_set_high_btemp_alert(info); | |
1061 | if (ret < 0) | |
1062 | dev_err(&info->pdev->dev, "high batt temp set fail:%d\n", ret); | |
1063 | ||
1064 | ret = fuel_gauge_set_low_btemp_alert(info); | |
1065 | if (ret < 0) | |
1066 | dev_err(&info->pdev->dev, "low batt temp set fail:%d\n", ret); | |
1067 | ||
1068 | /* enable interrupts */ | |
1069 | val = fuel_gauge_reg_readb(info, AXP20X_IRQ3_EN); | |
1070 | val |= TEMP_IRQ_CFG_MASK; | |
1071 | fuel_gauge_reg_writeb(info, AXP20X_IRQ3_EN, val); | |
1072 | ||
1073 | val = fuel_gauge_reg_readb(info, AXP20X_IRQ4_EN); | |
1074 | val |= FG_IRQ_CFG_LOWBATT_MASK; | |
1075 | val = fuel_gauge_reg_writeb(info, AXP20X_IRQ4_EN, val); | |
1076 | } | |
1077 | ||
1078 | static int axp288_fuel_gauge_probe(struct platform_device *pdev) | |
1079 | { | |
297d716f | 1080 | int ret = 0; |
5a5bf490 TB |
1081 | struct axp288_fg_info *info; |
1082 | struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); | |
297d716f | 1083 | struct power_supply_config psy_cfg = {}; |
5a5bf490 TB |
1084 | |
1085 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
1086 | if (!info) | |
1087 | return -ENOMEM; | |
1088 | ||
1089 | info->pdev = pdev; | |
1090 | info->regmap = axp20x->regmap; | |
1091 | info->regmap_irqc = axp20x->regmap_irqc; | |
1092 | info->status = POWER_SUPPLY_STATUS_UNKNOWN; | |
1093 | info->pdata = pdev->dev.platform_data; | |
1094 | if (!info->pdata) | |
1095 | return -ENODEV; | |
1096 | ||
1097 | platform_set_drvdata(pdev, info); | |
1098 | ||
1099 | mutex_init(&info->lock); | |
1100 | INIT_DELAYED_WORK(&info->status_monitor, fuel_gauge_status_monitor); | |
1101 | ||
297d716f KK |
1102 | psy_cfg.drv_data = info; |
1103 | info->bat = power_supply_register(&pdev->dev, &fuel_gauge_desc, &psy_cfg); | |
1104 | if (IS_ERR(info->bat)) { | |
1105 | ret = PTR_ERR(info->bat); | |
5a5bf490 TB |
1106 | dev_err(&pdev->dev, "failed to register battery: %d\n", ret); |
1107 | return ret; | |
1108 | } | |
1109 | ||
1110 | fuel_gauge_create_debugfs(info); | |
1111 | fuel_gauge_init_config_regs(info); | |
1112 | fuel_gauge_init_irq(info); | |
1113 | fuel_gauge_init_hw_regs(info); | |
1114 | schedule_delayed_work(&info->status_monitor, STATUS_MON_DELAY_JIFFIES); | |
1115 | ||
1116 | return ret; | |
1117 | } | |
1118 | ||
f1f27a4a | 1119 | static const struct platform_device_id axp288_fg_id_table[] = { |
5a5bf490 TB |
1120 | { .name = DEV_NAME }, |
1121 | {}, | |
1122 | }; | |
1123 | ||
1124 | static int axp288_fuel_gauge_remove(struct platform_device *pdev) | |
1125 | { | |
1126 | struct axp288_fg_info *info = platform_get_drvdata(pdev); | |
1127 | int i; | |
1128 | ||
1129 | cancel_delayed_work_sync(&info->status_monitor); | |
297d716f | 1130 | power_supply_unregister(info->bat); |
5a5bf490 TB |
1131 | fuel_gauge_remove_debugfs(info); |
1132 | ||
1133 | for (i = 0; i < AXP288_FG_INTR_NUM; i++) | |
1134 | if (info->irq[i] >= 0) | |
1135 | free_irq(info->irq[i], info); | |
1136 | ||
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | static struct platform_driver axp288_fuel_gauge_driver = { | |
1141 | .probe = axp288_fuel_gauge_probe, | |
1142 | .remove = axp288_fuel_gauge_remove, | |
1143 | .id_table = axp288_fg_id_table, | |
1144 | .driver = { | |
1145 | .name = DEV_NAME, | |
1146 | }, | |
1147 | }; | |
1148 | ||
1149 | module_platform_driver(axp288_fuel_gauge_driver); | |
1150 | ||
409e718e | 1151 | MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>"); |
5a5bf490 TB |
1152 | MODULE_AUTHOR("Todd Brandt <todd.e.brandt@linux.intel.com>"); |
1153 | MODULE_DESCRIPTION("Xpower AXP288 Fuel Gauge Driver"); | |
1154 | MODULE_LICENSE("GPL"); |